Broach mechanism



Oct. 16, 192:; 1,688,177

H. D. cRoF'r noAcH uEcnANlsM Filed March 31, 1927 J iii i l l g QL s D il' 1 Il l n 1% i* a @s e D l I El Lwn n Z INVENToR..

@i a@ f w A i i M am,

l i ATTORNEY.

Patented Oct. 16,` 1928.

- .Unirse STATES l 1,688,177 NAp'rlzNT OFFICE..

HIRAM D. CROFT, OF SPRINGFIELD, MASSACHUSETTS, .ASSIGNOR TO' PERKINS MACHINE .AND GEAR COMANY, MASSACHUSETTS.

er SrnINGFInLn, MAssAeHusnT'rS, A CORPORATION or :BRoAeH MEGHANISM.

Application filed March 31, 1927. ScrialNo. 179,960. y

My inwintion` rela-tes to in'iprovements in mechanisms for automatically changing the positions of reciprocating breaches, and con- Sists generally of certain` peculiarly cony structed breaches, means for holding said breachesv in. such a mannerthatV they can be projected alternately inte and out of opera# tive position or the cutting field, means for attac-hin said first-named 4means to a reciprocating me1nber,and means automatically to shitt said breaches rin said tiret-named means each timesaid member approaches either rend ci its travel, together with such other,V parts and members as may be neces* sary or desirable in order to' rendery the at airtime in breaching position or the'cutting field, to the end that the cutting orV breaching operation ispractically continuous, that is to say,'wheu the two breaches or two lines of breaches descend one of them makes a cut, and when they ascend the other makes a out, and the operation of breaching is thereby materiallyaccelerated, and

the production of Vthe machine equippedA with my mechanism correspondingly increased.

Another4 object iste produce a mechanism` et this character which is positive and ac# curatein its operation. f Y

Other objects and advantages will appear in the course ofthe following description.

This mechamism is designed to beincorporated with breachingv machines et the type disclosed in Letters Patent et the United. States. No. 1,642,593.

I attain the 'objects and secure the ad-V vantages lot my invention by the .mechanism illustrated intheaccompanying drawings, in whichl Figure l is a top plan of breach mecha` nism which embodies practicaljiierm et my invention. showing the same in connec-` `tion with the closely associated parts Vand members of a breaching machine,- and with certain portions broken away; Fig` 2, `al cross section throughpertions of'said mecha; nism and said parts andmembers,tale11on f by the numeral 9.

lines 2-2, lookingdown, in Fig. 4; Fig. 3, a left-hand side yelevation of said mechanism and said parts and members with portions breken out and broken away; Fig. 4, a front elevation of said mechanism, 4or enough of the same'to show its disposition whenthe breaches `are at rthe upper end of their travel;

FigQ` 5, a similar view showing the fdisposi` tien of said mechanism when said breaches are at the lower end of their travel, and,

Fig. 6, `a side elevation vof one. of the breaches. f e Similar reference characters .designate similar parts throughout the several views.-

The ol'dpa'rts and membersshewn inconnectienherewith as necessary for a complete understandingof the present invention comprise a column 1, a ram 3 arrangedte reciprocate vertically on said column, and provided on one side with a rack 4, and a pinion 5 intermeshing with .said rack, said pinion being mounted on av shaft 6.. From anyv suit-4 ablesourceof motivepewer the shaft 6 is caused te rotate, and, through the medium et the pinion 5 and the rack {hl-to actuate the ram 3 on the `column 1. Reversing `mechanism `for the shaft 6, and mechanism to bring about the operation of saldreversing mechanism eachtime the ram arrives at either end of its travel, are required, but these are Anot shown because vthe nature ofthe same is well understood. In this connectionhowever, reference may be had to.

said patent. .y ,r v .i

Broaches such as are used in this art are usuallylmade in sections arranged'endto endfand Al" have here shown rtwo lines of breaches ofthis character at 7 and 8, respectively, the former being at the left andthe l latter at the right.. The breaches 7 cut'k on the down stroke and the breaches 8 cut en the upstroke. The central longitudinal plane oit-the serrated partjof each of theV breaches 7 and Sis at an angle of 45 to the main or body part of the breach, indicatedy then the breaches are in placethebodies Sjotthebroaches 7 and the bodies 9 "of the breaches Sfare disposed atanf angle of 90 to eachother.' Extend? in g transversely through the body v9 ofeach f of the breaches 7 and 8 are two, more or less, pins l() which projectrbeyond both sides The` ram 3 is providedjon the'trent side' with a-holdermade up of an linterior or :intermediate Amember '11, outer or enclosing members 11?L and :11", and plates 12-12 Secured by screws-or other means `to lthe face i of the ram 3,in the longitudinal center thereof, isA the member 11 shaped in cross section substantially as shown in Fig. `2, and secured by bolts or other means to said face outside of said member and'spaced therefrom are the two members 11a and 151" shaped in cross sectionlalso Isubstantially as shown in vsaid view.- The' members 11a and 11b are similar inshape to eachy other eachother, except at'the rear ends where except that the lirst isa 'left-hand element andthe second a right-hand element.v This holder which ini'great part 'consists of the membersl 11, 11.21,y and '111),"has in the front sidethereof, inthe center, a vertical passage 1,3, and behind said passage ,verticalpas` sages 14.--14 arranged at an angle1of909 `to said lastfnamed passagesextend rearwardly through-the'back side .of the holdertothe face-of rain. The plates are secured by bolts or otherwiseto the top and 'bottom of the liolder-forming` membersll, 11d, v.and

11", rl`he.`plates12 in the present example',

are vboltedv to all three ofthe members 11., 11, and 11", and so assist insecuring said members .in place( Y o v A transverse slot l15 formed in ,thev face of thel ram 3 with the bottomofsaid slot on .a level y with the top ofthe holder. Bolted or otherwise. secured to the front side of the `ram` above the slot ,'15, butler;-

tending a short distance bellow the top edge of the same, isa-bar 15. n y l klVlounted for longitudinal moveinentin the passages or openings 1d in the yholdel are two carriers 17 having their rear or.

inner edges shaped to fit the .corresponding partsof l said openings,l and extending up-v wardly to provide posts 18f18 onthe back side o f `each of which at the top is mounted a roll19. In each lcarrier 1,7y isa` vertical slot 2Qthatopens through the .forward edge of said carrier, and in both sides ofsaid carrier kare diametrically-opposite `slotsf21. Each slot V211consists of outer and inner ybranches whicliare in parallel planes, and an oblique connection, substantially asshoivn -1n Eig. .6, The slots 2O are of a size and ,shape to receive the bod-ies A9 of the breaches 7 and 8,' and l,the slots 21 are offa size andshape .to receive the protruding vterminals of the pins 10 and permit the same to move betweenthe ends of said lastlnamed slots. The posts I i through suitable openings 1in rthe top' y'plate 14,111 kfront the Yslot r15,in the rain Y ..'lkhe plates 12 hold the carriers 17 .against independentk endwise movement rfin' the holder, The serrated parts of thefbroach'es l and Seperate in and out of the Apassage 1 3, either set of said broaches when adi the'corresponding sidesof `the ram 3 18 extend. u upwardly l vancedbeing located with the teeth projecting from said passage beyond the front side of the holder. p

,bviofusly, if YeithergcarrierV 17 be forced downwardly from 'its high positionin the holder, the breaches in said carrier, being held ragainst endwisc movement by the plates 12, must be actuated outwardly by the action' on' the pins 1Q, of the inclined edges of the grooves 21 in said carrier, and, if said carrier'be .actuatedupwardlyfrom its low position, said jbroaches must be drawn inwardly by the same meansi vlVhen either carrier 17 yis in its low position, the pins are in the upper-.end positions ofthe carrier slots 21,` and, when said carrier is'in its high position, said pinsarefin the lower-end portions of 'said slots. Since these end portions ofthefslots 21 are in Aparallel p,lanes,'the lpins 10- are in the same plane,'and the breachesk upper and 'under cam plates 25v and A26,'

respectively, ,saidV cam plates having their adjacent edges inclined* and parallel with eachother, but'the lower cam plate is located farther to the left than is the upper cam Dlate..y Y

A horizontal, movable cani plate 27 is' slidinglyarranged in the slot 15, with the upper and underedgeportions of said yplatek behind thebar 16 and the upper platel 12` respectively,and extends to the leftbeyond and holder. The ymovable cam plate 27 is provided at its outer terminal, behind', with a.

roll 28 inthe paths of which the jlixedjcain plates and` 26 are located. Inthe cam plate 27 is acam groove 29 in which are located therolls 19.v lThe intermediate and 'end portions Aofthe ,cam groove29 are in parallel planes, and such portions are connected byr v,portions Awhich extend divergently upwardly fromA 'the intermediate portion.

The parts are ysoproportioned that, when the cam' plate 27 is moved tothe right, the' right-hand roll-19 .is forced downwardly and the left-hand roll-19 upwardly',y thereby forcing the right-handv carrier 17 downwardly and advancing` the breaches 8, and forcing the left-hand carrier 17 .upwardly andlretractingfthe breaches 7. lMovement ofthe cani plate 2 7 in `the opposite direction, yor to theleft, reverses the movements of lthe carriers 17 and thebroaches 7 and 8. After the carriers 17 have been. ractuated or shifted,

they are held securely *in place by the rolls the other inthe inter'inediate horizontalportion of said groove. f A

VStarting with the parts disposed as in holder,A :breaches yin said holder, and .means Figs.` 1, 3, and l", the operation of ythis mech- Vanisni :as a whole is described as followszy Y The. broaclies 7 are carried down through the cutting iield, by the rain a ivh'enitdescenda and make their cut. yAs the ram approaches the lower end ot' its travel, and after the'cut is made, the roll 28 encountersthe-lived cam plate 2Sl andzisuthereby actuated inwardly, carrying with `it `the. cam plate 27. As the caniplate" 27 movesv inl wardly or to theright, the` riglit-handcar rier `17 is iforcedfdownwardly andthe letthand 'carrier r17 isiiorced u :iwardl j through "holder, l'broaches arranged?l in relative angun a, u f.. n i l lar relationship in. said holder, and meansthe medium ofthe rolls 19in the cam slot 29, and the posts 18. The Vdownward movementof the right-hand `carrieifr 17--causes the broachesS to be advanced into the cutting lield, through the medium of the pins which extend from said breaches into the cam slots 21 in said carrier, and the lefthand carrier 17 causes the breaches 7 to be retracted or Withdrawn from said cutting field. The broaches Tand 8:,vwhich previously were disposed as shown in Figs.. 1, 2, 3, and 4l, are nowV disposed as shown in Fig. 5. The roll 28 is now against the righthand edge of the fixed cam plate .26.

Next vthe rain4 3 ascends, causing the bro-aches 8 to make theircut, until, as said 'am approaches the upper end ot its travel, the roll 28encounters the fixed cam plate 25 and is actuated outwardly or tothe left, carrying with it the cam platev 27. The cam plate 27, in moving outwardly again,- reverses the positions of the rolls 19, so that the lett-hand carrier 17 is forced downwardly and the right-hand carrier 17 is forced upwardly. The downward movementof the left-hand carrier 17 advances or projectsthe bioaches 7 into the cutting field again, and thev upward movement of the right-hand carrier 17 retracts from said field the `broaches S. The roll 28 is now against the lett-hand edge ot' the ycam plate 25.

Upon the succeeding downward and upward movements of the rain 'the cycle ot operation of ythe mechanism is repeated, and so on indehnitely. i o

' The breaches 7 and 8, in being movedk into a nd out of the cutting tieldy intersect each others paths ol' travel to an extent which enables eitherset oi breaches to be'located with the central vertical plane of its teeth in the vertical plane of the holder for the carriers 17 which plane is alsothe central ver.- tical plane of the cutting field. y More or lessl change in the shape, size, construction, and arrangement of some or all of the parts of this mechanism may be n iade,` without departing ,from `the spiritcf -iny` invention or yexceeding lthe scope of what is claimed. i f

" alVhat Iclaini as my invention, and desire to securebyLetteisPatent, is-.v .i

'1., ln mechanism of the class described, a

alternately toretract and .advance1 ysaid breaches; in straight courses between parallel planes at the 'topr and bottom' of said broaches, out fof and into thecutting field. j v2. In ,mechanism of the class described, a holdem/breaches arranged in angular relationship' to yeach other in said holder,-and means alternately to,k retract andv advance said breaches, linv straight courses *between*` parallel'planes at the topl and bottomof said broaches from and into the cutting field: 3; In mechanism of the 'class described, a

to retract and advance 'saidwbroaches alter` y nately'in straight course'sfbetween "parallel planes atv the top and bottom of said broaches, andl causethem to intersect each oth-ers paths of movement.

hln mechanism of the. class described, a holder, breaches arranged in relative angular relationship in said holder,vand intermittently operating means simultaneously to retract and advance said breaches inv straight courses between parallel planes at the top and bottoni of the breaches.

5. In mechanism of the class described, a holder, broaches arranged in relative angular relationship in saidholder, and intermittently operating means siinultaneouslyto retract and advanceV said broaches, in straight courses between parallel planes at the top and bottom of the broaches, and

cause them alternately to intersect each others paths of travel, Y

6. In mechanism of the class described, a.

Vreciprocating member provided with a holder, broaches arranged in4 relative angular relationship in said holder, and means class describechwith a. reciprocating member provided with a holder, and broacli carriers in said holder. of means to actuate said carriers longitudinally' in Said holder in opposite directions each time said member ap` preaches eithergend of its travel..

8. In mechanism of the class described, a holder, carriers slidingly arrangedlengthwise in' said holder, and having cam slots therein, breaches slidingly arranged in said iris n carriers, between parallel:planes-fat tlietep vandfbetto'mof sad'brGarheS, and provided-l With'pins which extend inte saidcam slots,

and means teactu'ate said 'carriers and there* by move said breachesinte 'andeut ofthe cutting iield.

therein breaches slidngly arranged in said carriers, "between parallel Vplanes at the top and bottoingof saidy breaches, and provided.

with pins which extend into said slots, and

means to*y -v acti'iate said 'carriers' in oppositel directions-and thereby move `saidbi'oaclies alternatelyfinte and yontfef the ctting field. 10. Thefcembinaten, inmechai'iism ofthe class described, with `a recprocatinginember provided with ahelder, Aandfiixed camr plates,of' a -movable lcani plate carried by i sai-d` member, and 'havingl a Iprojection into s, thepath 'efe/Which saidfixedrc'ani plates extend,earrers arrangedte slide up and down fin' *said holderf'liaving cain slots in their sides, fa-n'd provided with projectionsA th'at eX- tend into 'engaging vvrelationsliip *with 'Said movable cami"lplarte, and lbro'aclie's arranged te slide in'said carriers,'betWeen parallelplanes at the topand'bettom of said breaches, and providedl 'with pins 'which proJeet into f said cam slots, whereby the movement el said movable cam plate ineit'herdirectien causes aerv said carrerste be actuated in opposite di-y vrections,`and said breach to beadvanced` and retracted, according te the directionsoftlie relative movements elv said carriers.

`11. In ki'ne'chansm of vthe lclass described,`

a holder, carriers arranged feilengitndnal movement in saidhelder, means to -move'said carriers in "said holder, breaches movable in'sad holder, in straifglitfcourses between parallel planes c' lat the top and Abottoni Aof said breaches, into `ai'i'doiit et' the cutting field, a'ndn'ieans te advance and lretract said breaches when saidv holder' is actuated.`

i- HIRAM i). enormi. 

